Pressure-fluid-actuated tool.



`To all whom t 'mag/concern." l

' UNITED sTATEs PATENT forniCE,. i i

j GEORGE H. .GILMANQ 0E CLAREMONT, NEW HAMrs-HIRE, 'AssIoNon Ei? MEsNE ASSIGNMENTS, To SULLIVAN MACHINERY COMPANY, or BosToN, MASSACHU- sETTsyA CORPORATION oEMAssACHUsETTs. v

rREssURE-rIJUID-ACTUATED TooL.

vBe it known that I, GEORGE H. GILM'AN, a citizen of the Unite'd States, and a resident of'Claremont, county oi' Sullivan, Statenf- New Hampshire, have. invented an Imprdement in Pressure Fluid Actuated Tooi', oi' which the following description, in confreetionwith the accompanying drawings,- is a specification, like Characters 'on the drawings representing like parts.

My in-vention relates to pressure fluid l actuated tools,- and is more particularly concerned'with'provision for permitting a turning movement of the cylinder and drill-bit,

or other tool, with respect to the 'grasping handle, `while utilizing fal -longitud1nal slid- Iing moveinentof the latter .to control the throttle valve.

My invention will be best understood by reference .'to.' the follow11ig speciiication,

when taken 1n connection 4with-the' accompanyingillustration oi' one specific embodin In the :drawings ment thereof, while its scope Will be more particularly pointed out in the appended claims.

V: Figure 1 is a longitudi-` f nal`cen'tral section of a pressure fluid actu# atedj tool embodying one formlof my inventiongfa'nd Fig. 2 is a detail sectional. view on line 2-2ofFig. 1.v Y l 4lteferring to the drawings, and tov the Specific embodiment of vmy invention which I .have there disclosed for illustrative purpose`s, I have `.there shown a pneumatic-tool4 Herein thel toolisyof the percussiveor .ham-

liaying affcylinder 3, in whicha'piston 4 is mounted tqvgreciprocate in the ,usuali wellyknown manner, and 'any usual or desired tool,7"as forl example a drill-'bit 5,*may be and preferai)ly vis imounted ina tool sleeve or bushing 6 in the front end ofthe cylinder 3;

. merf-,typeQ-and the piston 4 is providedy with, Y an-extension 7`adapted 4to strike'the inner end'othedrill-bit 5 inthe usualA and wellknofwrrfmanner. The piston may be con-' i, ltrolled..i1itsmoVements in any usual or deslredmlnanuerfwhleh 1t will be unnecessary describelihereimsince it is not essential to th@ illustration of my presentinventin. The V Cyiindysgr `3 mayV be and preferably is fpic'fjyidgd-atits rear 4endwith a hollow cas- Iii'gvSihaying-a pressure fluid supply passage v 9f:tornrnunieating with a constant pressure Specification of I Letters Patent.

chamber 10. The supply passage S may be Patented Feb. s, 1.916. Applration'led April 26, 1912. Serial N o. 593,336. I

chosen toremp'loy in 4connection with Amypresent invention is provided \vitlh"piston heads 12 .and-13, separated by a reduced portion lai.` The Ipiston head 12 works4 in a.v

cylindricalichamber l5 suitably formedmin the casing 8, to the bottom of which chamber a pressure duct 16 leads through the'supply lpassage i), the lower end of the piston head l2beingthereby exposed to constantly act-3 The' throttlewalve J11 is under control of i' V a graspldg` handle 17 g4 which is mounted to.

slide lgmgitudinahy and swivel Vwithv respect to the cylinder 3. Preferably the grasping handle 17 is mounted to swivel upon alongitudinally slidable head 18,' which bears against the rear end of the throttle valve 11,1

and has a` limited longitudinal sliding movement with'respe'ct to the cylinder, its movement being limited by suitable means,` as for example, a stud 19 projecting through a slot 20 provided in thes'lidable head and screwed' This stud .may"v into the hollow casing S., also serve as a conduit .for the pressure fluid supply, and to that end itis herein provided with an air inlet passage-21 communicating with the supply passage 9. i W hen vthe tool is-pressed against its work, the hand pressurey upon the grasping handle 147 acts against the head 13 of the throttle valve, 11, and forces the latter into the position shown with its reducedportion 14 lying across the `supply. passage 9 and permitting free passage therethrough of-'the pressure 1 'iluid. When the operator withdrawspthe tool from the ,work "and'relieves sure oi' his hand against the grasping han.- dle, the constantly acting pressure -iudupon the piston'head 12 at the yforward end of the throttle valve forces the latter-.back against the sliding latter rearwardly upon the casing 8. The lvalve follows the slidable head in itsv movehead 18, and pushes the:

Ito

ment until the latter .is brought torest 7 against the stud 19, this movement. of the valve being suiliclent to bring the throttle'- valves pistonhead 12 across the supply pitssage 94 into' position to .close the same.

' screwing by The grasping handle 17 may be sWiveled upon the slidable headlSin any suitable mannen-as for example, by providing the head with a reduced portion 22 receiving an internal annular flange-23 Within the bore of the handle 17, and by providing a. nut A24 having screw-threaded engagement with the sliding head and acting to prevent the grasping handle from being pulled 01T of the latter.. This nut may be prevented from unsuitable means, as for example,

, a split spring washer 25 bearing thereagainst and `The pressure Huid is herein supplied to the 'tool through a conduit 26 having a passage 27, communicating with the passage 21 y and the usual hose (not shown) maybe sired, without further provision, constitute a grasping vthis purpose.

`coupled on to this lfitting in any usual or desired manner. The conduit 26 may if'den handle for turning the cylinder with respect to the grasping handle-17, but Iprefer to provide the conduit 26 with a laterally extending grasping handle 28 for The operator grasps the grasping handle 17 with one hand, and the grasping handle 28 with the other hand, and

i while .pressing the tool against the' Work ,turns the saine to and fro with respect to the handle 17, by swinging the handle 28 to and fro. By this means, the cylinder,

acting through the bushing 6, turns the' drill-bit 5 to and fro as the drilling operan tion. proceeds.

While I have herein shown and described.

. one specific embodiment of my invention for illustrative' purposes, and have disclosed and discussed `in detail the construction and arrangement incideiital to one specific embodiment tliereof, it is to be understood that tlie invention is limited neither to the mere i details or relative arrangement of parts, noi' to its specific'gembodiment herein shown, but .that extensive deviations from the illustrated form or embodiment of the invention may be made within the scope of the claims Without departing from the principles thereof.

encircling the reduced portionf 22 of the head 18.

Having thus described one embodiment of my invention., What I claim is l. ln, a pressure-fluid actuated tool, the combination with the cylinder and piston, of a 'grasping handle mounted to slide longi 'tudinally and swivel with respect to said cylinder, a longitudinally slidable throttle valve under the control of said handle,'a laterally extending grasping handle for turning said cylinder with' respect to the inst-mentioned grasping handle,`the second mentioned handle being provided with a pressure-Huid' supply passage.

2. In a. pressure-Huid actuated tool, the

combination with the cylinder and piston, of a head mounted to slide vlongitudinally with respect to said cylinder, a grasping handle siviveled upon said head, a longitudinally slidable throttle valve under the control of said sliding head, laterally extending means to conduct pressure-Huid toward said throt-'L tle valve, and a laterally extending grasping handle 'for turning said cylinder with respect to first-mentioned grasping handle, the second mentioned grasping handle being provided with apressure-fluid supply pasf sage leading toward said throttle valve.

3L In a Apressure-Huid actuated tool, the combination with the' cylinder and piston of a head mounted on said cylinder and provided with a, reduced portion, a grasping wf handle -siviveled on said head, means for holding said grasping handle in place on said hea'd comprising a member secured to said reduced portion, said handle being pro-l vided with an inwardly projecting portion f i interposedbetween said member and said head, and retaining means for said member linterposed between said reduced portion and said inwardly projecting portion and be-'- 

